If buildhistory-diff can't import git module it throws error
message suggesting to install it.
Due to the move to Python 3 the suggested package name and
version became outdated.
Changed package name to python3-git and version to >= 0.3.4
as GitPython supports Python 3 starting from 0.3.4.
[YOCTO #9741]
(From OE-Core rev: 0632c3e69070e340218c1c1c835b2343cd143d8d)
Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
b2b1a5fa46